Gas-engine.



GAS ENGINE.

Patented Apr. 9, 1912 2 SHEETS-SHEET 1.

........... .-.Suf v R. s.l MooRB"& J. L. SIMMONS.-

APPLIGATIO FILED NOV. l, 1910.

R. s. MOORE a@ J. L. SIMMONS.

` GAS ENGINE.

APPLIOATION FAILED NOV.11910.

1,022,864. Patented Apr.19, 1912. v 2 VSimms-slum' 2.

my@ @l 2f @iQ- ff Will/10m' yinonnn'rs. MooREANnJAMEs LEE SIMMQMS,,or WAsnrNe'noN, nrsrnro'r onrechtmrm, AssIeNons To Grito .Moron COMPANY, or wasnrneronj; nrsrnrcrgor f COLUMBIA, A ooBPon-.uronor nnmwann. fr

To all whom 'it'may concern: Y

Be it'known that we, ROBERT S. MOORE kand JAMES LEE SIMMONS, citizens of the United States, residing at Washington, in the District of Columbia, have invented certain new and useful Improvements in Gas- Engines, of which the following is a. description, reference being had to the accompanying drawing, and to the letters and figures of referencemarked thereon.

The invention relates tonew and useful improvement-sin gas engines and more especially to gas engines of the type wherein cylinders yrotate about a stationary crank shaft, although it is obvious that from certain aspects theinvention is also adapted to be used in connect-ion with an engine vof the type wherein cylinders are stationary' and:k

thecrank V`shaft rotates. l

An objectpof the invention is to provide a valve and cont-rolling mechanism therefor, for the intake orcharging of the cylinder, which valve mechanism shall be of simple v construction and of few parts, whereby the Fig. 4 is weight of said mechanism is reduced to a minimum, and whereby there is less liability of the mechanism becoming inoperative or ineffective.

A further object of the invention is to provide a four cycle multiple cylinder rotary cylinder gas engine with intake valves located in the pistons of the cylinder, together with mechanism cont-rolled by the piston rod duringthev rotation. of the cylin-y ders for operating said valves.

These and otherobjects will in part'be obvious, and will in part be hereinafter more fully described.

In'the drawings which show by way of illustration one embodiment of the invention; Figure 1 is a horizontalseotional view through -a vmultiple cylinder engine embody-` ing our invention. Fig. 2 is a vertical sec tion through one of the cylinders and a por-v tion of the crank casing. 'F ig. 3 is an enlarged horizontal section'through one of the cylinders and a portion of the crank casing. a detached end view of the oil guard.

We have Vshown our invention 'as applied to a multiple cylinder' enginejwhiehis provided 'with a crank shaft 1, carrying acrank y e to 'which connected the 'pieten `reds 3 Specification of Letters Patent.

operating in connection with each cylinder. The crank shaftis preferably a stationary crank shaft, and the casing 4,V carrying the cylinders is rotated about said stationary crank shaft. It will be obvious however, that from cert-an'aspects of the invention, vthe casing 4 may be stationary and the crank pistons. Said casing -4 is'herein shown as carrying five cylinders v5, 6l, 7, V8, and 9.

to which the piston rod 3 may be pivotally connected in any desired .-way.

Located centrally of each piston .head is tends through a4 suitable bearing 14 carried by a cross support 15, which bridges the opening in the piston head and is connected to the piston head. 4A spring 16V surrounds the bearing 14 resting at one end against the cross support and atY its other end against This springfwill normally hold .the valve seated in the opening in the piston head.

with an enlarged head 18 which has a groove A cam finger 20 is pivoted at one end in said spring 22 is seated at one end in a socket 23 formed in the enlarged head 18 yof the pisthe cani nger 20 normally holding the same raised as shown in Fig. 3, :A-suitable stop may be providedv for limiting the outward movement of the cam linger 20. Saidk cam adapted to engage the outer rounded end rotate, the angle ofthe piston rod relative to the longitudinal axis of thecylinder is varied and said variation or change inthe cam shoulder. 24 into and out ofcontact with thevalve `stem 13. f As the cam 24 :slides underneath'the end of the valve stem, the valve will bev raised fromits seat, to -allOW -theintake from4 the 'crank casing. The spring 22will however, yieldso as to allow the valve to remain closed during the expansion of the vgases in the cylinder. Thls is accomplished by means sf the fact that the y Patent'eanpr. 9,1912.'

Application led November 1, 1910. Serial No. 590,237.

shaftl rotated by they recipro'cation of the a disk 17y attached to the stem of the valve.4

Each cylinder is provided with a piston 10 an opening 11 in which is seated a valve 12.' The valve 12 carries a stem 13 ,which` ex- The outer end of the-piston 3 is provided .i l

l or recess'19l extending transversely thereof. Y

groove or recess 19, by a pivot bolt 21. A

tonrod, and at its other end bears against finger 20 has ya cam shoulder 24 which is 25 of the valvel stem 13. As-the cylinders angular position of the piston'rod vmoves the force of expansion 'of the gases overcomes the resistance of the spring 22 and causes the same to yield. The spring 22 is of course, normally of greater resistance than the spring 16, so that when the cylinder is free from the expanding gases, the valve 12 will be opened by contact with the cam 24. The cylinder is provided with a suitable opening 27 in itsouter end and an exhaust valve 26 is seated in said opening. Said exhaust valve is operated in the usual manner in a four cycle engine, so that said valve is opened during a portion of every other rotation of said cylinders.

In describing the operation of our device, the cylinder 6 in Fig. 1 may be considered as the second position of the cylinder 5, and the cylinder 7 considered the third position of the cylinder 5 and likewise for the cylinders 8 and 9. Starting with the cylinder 5 in the position shown in Fig. 1 and assuming 'that the gases in the cylinder are com-v l pressed and that the cylinder is at the firing position, the rotation of the cylinder to the Vposition of the cylinder 6 `will bring the cam 24 into engagement with the lower end of the valve stem. Inasmuch as, the gases in the cylinder are expanding anl forcing the piston out of the cylinder, the valve will be forced againstits seat in the piston head and the spring 22 underneath the cam 20 compressed thus closing the cylinder to the intake from gas from the "crank casing. The expansion 'of the gas continues as the cylinder rotates to the position of the cylinder 7. When the cylinder passes the 180 i point in its rotation, the angle of the piston rod will be changed relative tothe cylinder and the cam 24 will be moved away from the 40 valve stem so that said valve stem is :en-

tirely free from contact with the cam during the remainder ofthe rotation of the cylinder. y

The exhaust valve 26 is so timed fthat .45 after the cylinder passes the 180 pointin its oscillation, the valve will be opened to allow the escape of-the burned gases. The intake valve is closed as above noted and the rotation of the cylinder 5 tothe position shown in Fig. 3 will force the burned gases from the cylinder. TheV exhaust valve is now closed and as the cylinder continues its rotation, the intake valve 12 will be opened by the cam projection 24 during the rotation of the cylinder through the next arc of 180",

and the gases in the crank chamber will pass through into the cylinder. The intake valve is then closed as the cam projection qlnoves ,'away from the valve stem and as the ex- 'haust valve is still held closed the completing of this rotation of the cylinder will compress the gases in the cylinder readyl for the firing and for the next cycle of operation. Anothenfeature of our invention consists in an oil guard which is attached to the pisslotted at 31 to allow the free movementof the pitman. The piston is also cut away at 28 and 29 so as to form spaced bearing surfaces for the piston, and allow the free passage of the lubricating oil from the crank casing to the. wearing parts ot the piston. These parts, however, are not claimed herein as they form the subject mattei' of a co-pending application Serial No. 590,236 tiled concurrently herewith.

It is obvious that minor changes in the details of construction may be made without departing fromY the spirit of our invention.

Having thus particularly described our invention. what we claim as new and desire to secure by Letters Patent, is

1` A gas engine including in combination a cylinder, a piston, an intake valve located in the piston," a piston rod connected to said piston. and means actuated by the piston rod tor opening said inta-ke valve` said means including a member capable of yielding so as to allow the intake valve to remain closed yduring the expansion of the gases in the cylinder.

2. A gasengine including in combination, a cylinder. a piston, an intake lvalve located in said piston, a -piston rod connected to said piston, means carried by the piston rod for opening said intake valve, said means including a member capable of yielding so as to allow the intake valve to remain closed, during the expansion ct the gases in the cylinder.

3. A gas engine including in combination. a cylinder, a piston. a piston rod connected to` said piston, an intake valve mounted in said'piston, a cam carried by said pist-on rod and adapted to engage said valve and open` the saine and means for supporting said cam whereby the same may yield so as to allow the intake valve to remain closed during the expansion-of the gases in the cylinder. l

4. A. gas engine including in combination. a cylinder, a piston, a piston rod connected to said piston, a valve mounted in said piston, a cam nger pivoted to said piston rod and adapted to engage said valve. ,and a spring for yieldingly holding said ca m finger in operative position to engage said valve.

5. A gas engine including in combination,

` a rotating casing, a cylinder carried thereby, 'a stationary crank shaft, a piston, apiston rod connecting said piston and said crank shaft, an intake valve mounted in said piston, a cam carried by said piston rod for engaging said valve as the cylinder rotates, and means for supporting said earn whereby the same may vield to allow the intake Valve to remain closed during the expansion of the gases in the cylinder.

6; A gas engine including in combination7 'a rotating casing, a cylinder carried thereby,

a. stationary crank shaft, a piston in said cylinder, a piston rod connecting said piston to said crank shaft, an intake yalye mounted in said piston, a cani finger pivotally connected to said piston rod and having a projecting cani adapted to engage said valve as the cylinder'rotates, and a spring for yieldingly supporting said cani linger.

7. A gas engine including in combination, a rotary casing, a cylinder carried thereby, a ,stationary crank shaft,v a piston located in said cylinder,` a piston rod connecting said piston to said crank shaft, said piston rod having an enlarged head with a recess formed therein, a cam finger piyoted said recess in the piston rod, a cani project-ion carried by said linger forengaging the valve Vas the cylinder rotates, a spring seated at onel end in said piston rod, and bearing its other end against said cam linger for yieldingly holding the saine in operative position. 8. A gas engine including in Lcombination, a rotary casing, a lcylinder carried thereby, any exhaust valve in the outer end of said cylinder, a piston mounted 1n said cylinder, a stationary crank shaft centrally -through said casing, a piston rod connecting natures. inpresence of two Witnesses.

ROBERT S. MOORE. JAMES LEE SIMMONS.

lvitnesses E. H. PARKINS, 4 C., L.` STURTEVANT. 

